Heretic: guns are illegal in this country, and many other European nations. We have a
much lower incidence of gun violence here than elsewhere. I concede that it doesn't stop everyone, and those who are committed to getting a gun can probably do so. However, it cuts off the easiest route of supply. Only those who connive to get a gun can do so.
Why was this done? Because seven years ago, a guy walked into a Scottish school with a legally-owned gun, and shot a dozen or so six-year-olds and their teachers. Since the outlawing of handguns, no such incident has been repeated.
The point is you can make it harder for criminals to get guns. It won't stop everyone, but it does stop most of 'em - here, at least. Now, if you're prepared to argue that Americans are in some way different to that, genetically or socially...
Besides, I bet if I dug up the figures, most gun violence, like other violence will have been committed within the home, by members of the same family to one another. Most gun violence involves legally-owned guns.
